@charset "UTF-8";
/* ============================================================================
 * 奇点CMS 官方网站 · 前台样式（完全自包含，无任何外部资源/字体/CDN）
 * 结构：变量 → 重置 → 排版 → 顶栏/导航 → Hero → 区块 → 卡片/网格 → 按钮
 *       徽标 → 表格 → 表单 → 提示 → 步骤 → 价格 → FAQ → 页脚 → 工具类 → 响应式
 * ========================================================================== */

/* ---------- 1. 变量 ---------- */
:root {
    --of-primary: #2563eb;
    --of-primary-dark: #1d4ed8;
    --of-primary-soft: #eff4ff;
    --of-accent: #06b6d4;
    --of-ink: #0f172a;
    --of-ink-2: #1e293b;
    --of-text: #334155;
    --of-muted: #6b7c93;
    --of-line: #e3e8f0;
    --of-line-soft: #eef2f7;
    --of-bg: #f5f7fb;
    --of-card: #ffffff;
    --of-dark: #0b1220;
    --of-dark-2: #131c2e;
    --of-green: #16a34a;
    --of-green-soft: #e9f8ef;
    --of-red: #dc2626;
    --of-red-soft: #fdecec;
    --of-amber: #b45309;
    --of-amber-soft: #fff5e5;
    --of-radius: 14px;
    --of-radius-sm: 9px;
    --of-shadow: 0 1px 2px rgba(15, 23, 42, .04), 0 8px 24px -12px rgba(15, 23, 42, .16);
    --of-shadow-lg: 0 18px 48px -20px rgba(15, 23, 42, .34);
    --of-wrap: 1160px;
}

/* ---------- 2. 重置 ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
    margin: 0;
    background: var(--of-bg);
    color: var(--of-text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", Arial, sans-serif;
    font-size: 15px;
    line-height: 1.72;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}
img, svg, video { max-width: 100%; height: auto; }
a { color: var(--of-primary); text-decoration: none; }
a:hover { color: var(--of-primary-dark); }
h1, h2, h3, h4 { color: var(--of-ink); line-height: 1.35; margin: 0 0 .5em; font-weight: 700; }
h1 { font-size: 30px; }
h2 { font-size: 24px; }
h3 { font-size: 17px; }
h4 { font-size: 15px; }
p { margin: 0 0 1em; }
ul, ol { margin: 0 0 1em; padding-left: 1.35em; }
li { margin: .25em 0; }
code, kbd, pre {
    font-family: "Cascadia Mono", Consolas, "Courier New", "Microsoft YaHei Mono", monospace;
    font-size: .92em;
}
code {
    background: #f2f5fa;
    border: 1px solid var(--of-line);
    border-radius: 6px;
    padding: 1px 6px;
    color: #0b4a9b;
    word-break: break-all;
}
pre {
    background: #0e1626;
    color: #d8e2f2;
    border-radius: var(--of-radius-sm);
    padding: 14px 16px;
    overflow-x: auto;
    line-height: 1.6;
    margin: 0 0 1em;
}
pre code { background: none; border: 0; color: inherit; padding: 0; }
hr { border: 0; border-top: 1px solid var(--of-line); margin: 26px 0; }
:focus-visible { outline: 2px solid var(--of-primary); outline-offset: 2px; border-radius: 4px; }

.of-wrap { width: 100%; max-width: var(--of-wrap); margin: 0 auto; padding: 0 18px; }
.of-main { min-height: 60vh; }
.of-skip {
    position: absolute; left: -9999px; top: 0; z-index: 99;
    background: #fff; color: var(--of-ink); padding: 8px 14px; border-radius: 0 0 8px 0;
}
.of-skip:focus { left: 0; }

/* ---------- 3. 顶栏 / 导航 ---------- */
.of-top {
    position: sticky; top: 0; z-index: 60;
    background: linear-gradient(180deg, #0d1527 0%, var(--of-dark) 100%);
    border-bottom: 1px solid rgba(255, 255, 255, .07);
}
.of-top.is-stuck { box-shadow: 0 8px 26px -14px rgba(2, 8, 23, .9); }
.of-top-in {
    display: flex; align-items: center; gap: 20px;
    min-height: 62px;
}
.of-brand { display: flex; align-items: center; gap: 10px; flex: 0 0 auto; }
.of-logo {
    width: 34px; height: 34px; border-radius: 10px; flex: 0 0 auto;
    background: linear-gradient(135deg, var(--of-primary) 0%, var(--of-accent) 100%);
    color: #fff; font-weight: 800; font-size: 17px;
    display: flex; align-items: center; justify-content: center;
    letter-spacing: -.5px;
}
.of-brand-b { display: flex; flex-direction: column; line-height: 1.25; }
.of-brand-n { color: #fff; font-weight: 700; font-size: 16px; letter-spacing: .3px; }
.of-brand-s { color: #8ea0bd; font-size: 11px; }
a.of-brand:hover .of-brand-n { color: #cfe0ff; }

.of-nav { margin-left: auto; display: flex; align-items: center; gap: 2px; }
.of-nav a {
    color: #c3cede; font-size: 14px; padding: 8px 12px; border-radius: 8px;
    white-space: nowrap; transition: background .15s, color .15s;
}
.of-nav a:hover { color: #fff; background: rgba(255, 255, 255, .08); }
.of-nav a.is-on { color: #fff; background: rgba(37, 99, 235, .28); font-weight: 600; }
.of-top-cta { margin-left: 12px; flex: 0 0 auto; }

.of-burger {
    display: none; margin-left: auto;
    width: 40px; height: 36px; border-radius: 9px; cursor: pointer;
    background: rgba(255, 255, 255, .08); border: 1px solid rgba(255, 255, 255, .16);
    padding: 9px 9px;
}
.of-burger span {
    display: block; height: 2px; background: #dbe4f2; border-radius: 2px;
    margin: 4px 0; transition: transform .2s, opacity .2s;
}
.of-burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.of-burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.of-burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

@media (max-width: 1000px) {
    .of-nav {
        position: absolute; left: 0; right: 0; top: 100%;
        flex-direction: column; align-items: stretch; gap: 0;
        background: var(--of-dark-2); border-bottom: 1px solid rgba(255, 255, 255, .1);
        padding: 8px 14px 16px; display: none;
        max-height: calc(100vh - 62px); overflow-y: auto;
    }
    .of-nav.is-open { display: flex; }
    .of-nav a { padding: 11px 12px; font-size: 15px; border-bottom: 1px solid rgba(255, 255, 255, .06); border-radius: 0; }
    .of-nav a.is-on { background: rgba(37, 99, 235, .22); }
    .of-nav .of-top-cta { margin: 12px 0 0; }
    .of-nav .of-top-cta .of-btn { width: 100%; justify-content: center; }
    .of-burger { display: block; }
    .of-top-cta.of-desktop { display: none; }
}
@media (min-width: 1001px) { .of-top-cta.of-mobile { display: none; } }

/* ---------- 4. Hero ---------- */
.of-hero {
    position: relative; overflow: hidden;
    background:
        radial-gradient(900px 420px at 12% -10%, rgba(37, 99, 235, .38), transparent 62%),
        radial-gradient(700px 380px at 92% 8%, rgba(6, 182, 212, .26), transparent 60%),
        linear-gradient(160deg, #0d1527 0%, #101c33 55%, #0b1220 100%);
    color: #d7e1f0;
    padding: 62px 0 66px;
}
.of-hero::after {
    content: ""; position: absolute; inset: auto 0 0 0; height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, .28), transparent);
}
.of-hero-grid { display: grid; grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr); gap: 44px; align-items: center; }
.of-hero h1 { color: #fff; font-size: 40px; line-height: 1.22; margin-bottom: 14px; letter-spacing: -.5px; }
.of-hero h1 em { font-style: normal; color: #7fd7ff; }
.of-hero-sub { color: #a8b8d0; font-size: 16.5px; max-width: 620px; margin-bottom: 22px; }
.of-hero-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 26px; }
.of-chip {
    display: inline-flex; align-items: center;
    background: rgba(255, 255, 255, .08); border: 1px solid rgba(255, 255, 255, .16);
    color: #cfe0ff; font-size: 12.5px; padding: 4px 11px; border-radius: 999px;
}
.of-hero-btns { display: flex; flex-wrap: wrap; gap: 12px; }
.of-hero-note { margin-top: 20px; color: #8ea0bd; font-size: 13px; }
.of-hero-note code { background: rgba(255, 255, 255, .08); border-color: rgba(255, 255, 255, .16); color: #cfe0ff; }

.of-hero-card {
    background: rgba(255, 255, 255, .045);
    border: 1px solid rgba(255, 255, 255, .12);
    border-radius: 18px; padding: 18px;
    box-shadow: var(--of-shadow-lg);
    backdrop-filter: blur(2px);
}
.of-hero-card h3 { color: #fff; font-size: 14px; margin: 0 0 12px; letter-spacing: .4px; }
.of-hero-list { list-style: none; margin: 0; padding: 0; }
.of-hero-list li {
    display: flex; justify-content: space-between; gap: 12px; align-items: baseline;
    padding: 9px 0; border-bottom: 1px dashed rgba(255, 255, 255, .12);
    color: #c3cede; font-size: 13.5px;
}
.of-hero-list li:last-child { border-bottom: 0; }
.of-hero-list b { color: #fff; font-variant-numeric: tabular-nums; font-size: 15px; }

/* ---------- 5. 区块 ---------- */
.of-sec { padding: 56px 0; }
.of-sec.is-tight { padding: 38px 0; }
.of-sec.is-alt { background: #fff; border-top: 1px solid var(--of-line-soft); border-bottom: 1px solid var(--of-line-soft); }
.of-sec-head { max-width: 760px; margin-bottom: 30px; }
.of-sec-head.is-center { margin-left: auto; margin-right: auto; text-align: center; }
.of-eyebrow {
    display: inline-block; font-size: 12px; font-weight: 700; letter-spacing: 1.4px;
    color: var(--of-primary); text-transform: uppercase; margin-bottom: 8px;
}
.of-sec-head h2 { font-size: 27px; margin-bottom: 10px; }
.of-sec-head p { color: var(--of-muted); margin: 0; font-size: 15px; }

/* ---------- 6. 卡片 / 网格 ---------- */
.of-grid { display: grid; gap: 18px; }
.of-g2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.of-g3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.of-g4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.of-auto { grid-template-columns: repeat(auto-fill, minmax(268px, 1fr)); }
.of-auto-sm { grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); }

.of-card {
    background: var(--of-card); border: 1px solid var(--of-line);
    border-radius: var(--of-radius); padding: 22px;
    box-shadow: var(--of-shadow);
}
.of-card.is-flat { box-shadow: none; }
.of-card.is-dark { background: var(--of-dark); border-color: rgba(255, 255, 255, .1); color: #c3cede; }
.of-card.is-dark h3 { color: #fff; }
.of-card h3 { margin-top: 0; }
.of-card > :last-child { margin-bottom: 0; }

.of-fcard { transition: transform .16s ease, box-shadow .16s ease, border-color .16s ease; }
.of-fcard:hover { transform: translateY(-3px); box-shadow: var(--of-shadow-lg); border-color: #cfdcf2; }
.of-ico {
    width: 40px; height: 40px; border-radius: 11px; margin-bottom: 12px;
    display: flex; align-items: center; justify-content: center;
    font-size: 19px; font-weight: 700;
    background: var(--of-primary-soft); color: var(--of-primary);
}
.of-ico.is-cyan { background: #e6fbfe; color: #0e7490; }
.of-ico.is-green { background: var(--of-green-soft); color: #15803d; }
.of-ico.is-amber { background: var(--of-amber-soft); color: var(--of-amber); }
.of-ico.is-violet { background: #f2ecfe; color: #6d28d9; }
.of-fcard h3 { font-size: 16px; margin-bottom: 6px; }
.of-fcard p { color: var(--of-muted); font-size: 13.5px; margin: 0 0 10px; }
.of-fcard .of-tags { margin: 0; }

.of-kv { list-style: none; margin: 0; padding: 0; font-size: 13.5px; }
.of-kv li { display: flex; gap: 10px; padding: 7px 0; border-bottom: 1px dashed var(--of-line); }
.of-kv li:last-child { border-bottom: 0; }
.of-kv b { flex: 0 0 96px; color: var(--of-ink); font-weight: 600; }
.of-kv span { color: var(--of-text); min-width: 0; word-break: break-word; }

/* ---------- 7. 统计 ---------- */
.of-stats { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
.of-stat {
    background: #fff; border: 1px solid var(--of-line); border-radius: var(--of-radius);
    padding: 20px 18px; text-align: center;
}
.of-stat b {
    display: block; font-size: 30px; line-height: 1.15; color: var(--of-primary);
    font-variant-numeric: tabular-nums; letter-spacing: -.5px;
}
.of-stat i { font-style: normal; color: var(--of-muted); font-size: 13px; }
.of-stat.is-dark { background: rgba(255, 255, 255, .05); border-color: rgba(255, 255, 255, .12); }
.of-stat.is-dark b { color: #7fd7ff; }
.of-stat.is-dark i { color: #a8b8d0; }

/* ---------- 8. 按钮 ---------- */
.of-btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 7px;
    font-size: 14.5px; font-weight: 600; line-height: 1.2;
    padding: 11px 20px; border-radius: 10px; cursor: pointer;
    border: 1px solid transparent; background: var(--of-primary); color: #fff;
    transition: background .15s, color .15s, border-color .15s, transform .12s, box-shadow .15s;
    text-align: center; white-space: nowrap;
}
.of-btn:hover { background: var(--of-primary-dark); color: #fff; }
.of-btn:active { transform: translateY(1px); }
.of-btn.is-ghost { background: rgba(255, 255, 255, .1); border-color: rgba(255, 255, 255, .3); color: #fff; }
.of-btn.is-ghost:hover { background: rgba(255, 255, 255, .2); color: #fff; }
.of-btn.is-outline { background: #fff; border-color: var(--of-line); color: var(--of-ink); }
.of-btn.is-outline:hover { border-color: var(--of-primary); color: var(--of-primary); background: #fff; }
.of-btn.is-soft { background: var(--of-primary-soft); color: var(--of-primary-dark); }
.of-btn.is-soft:hover { background: #e2ebff; color: var(--of-primary-dark); }
.of-btn.is-danger { background: var(--of-red); }
.of-btn.is-danger:hover { background: #b91c1c; }
.of-btn.is-gray { background: #eef2f7; color: var(--of-ink-2); }
.of-btn.is-gray:hover { background: #e2e8f1; color: var(--of-ink-2); }
.of-btn.is-sm { padding: 7px 14px; font-size: 13px; border-radius: 8px; }
.of-btn.is-lg { padding: 14px 28px; font-size: 16px; border-radius: 12px; }
.of-btn.is-block { width: 100%; }
.of-btn[disabled], .of-btn.is-disabled { opacity: .55; pointer-events: none; }

/* ---------- 9. 徽标 / 标签 ---------- */
.of-badge {
    display: inline-flex; align-items: center; gap: 4px;
    font-size: 12px; font-weight: 600; line-height: 1.5;
    padding: 2px 9px; border-radius: 999px;
    background: #eef2f7; color: #475569; border: 1px solid transparent;
    white-space: nowrap;
}
.of-badge.is-green { background: var(--of-green-soft); color: #15803d; }
.of-badge.is-blue { background: var(--of-primary-soft); color: var(--of-primary-dark); }
.of-badge.is-amber { background: var(--of-amber-soft); color: var(--of-amber); }
.of-badge.is-red { background: var(--of-red-soft); color: #b91c1c; }
.of-badge.is-cyan { background: #e6fbfe; color: #0e7490; }
.of-badge.is-violet { background: #f2ecfe; color: #6d28d9; }
.of-badge.is-dark { background: #1e293b; color: #cbd5e1; }
.of-badge.is-outline { background: #fff; border-color: var(--of-line); color: var(--of-muted); }
.of-tags { display: flex; flex-wrap: wrap; gap: 6px; }

.of-rate { color: #f59e0b; font-weight: 700; font-size: 13px; letter-spacing: 1px; }
.of-rate i { font-style: normal; color: var(--of-muted); font-weight: 500; letter-spacing: 0; margin-left: 4px; }

/* ---------- 10. 插件卡 ---------- */
.of-pcard {
    display: flex; flex-direction: column;
    background: #fff; border: 1px solid var(--of-line); border-radius: var(--of-radius);
    padding: 20px; box-shadow: var(--of-shadow);
    transition: transform .16s, box-shadow .16s, border-color .16s;
}
.of-pcard:hover { transform: translateY(-3px); box-shadow: var(--of-shadow-lg); border-color: #cfdcf2; }
.of-pcard-top { display: flex; gap: 12px; align-items: flex-start; margin-bottom: 10px; }
.of-pcard-top .of-ico { margin-bottom: 0; flex: 0 0 auto; }
.of-pcard-name { font-size: 16px; font-weight: 700; color: var(--of-ink); margin: 0 0 3px; }
.of-pcard-name a { color: inherit; }
.of-pcard-name a:hover { color: var(--of-primary); }
.of-pcard-cat { font-size: 12px; color: var(--of-muted); }
.of-pcard-sum { color: var(--of-muted); font-size: 13.5px; margin: 0 0 14px; flex: 1 1 auto; }
.of-pcard-meta {
    display: flex; flex-wrap: wrap; gap: 6px 14px; align-items: center;
    border-top: 1px solid var(--of-line-soft); padding-top: 12px; margin-top: auto;
    font-size: 12.5px; color: var(--of-muted);
}
.of-pcard-meta b { color: var(--of-ink); font-variant-numeric: tabular-nums; }
.of-price { color: var(--of-red); font-weight: 700; }
.of-price.is-free { color: var(--of-green); }

/* ---------- 11. 表格 ---------- */
.of-table-wrap { width: 100%; overflow-x: auto; -webkit-overflow-scrolling: touch; }
table.of-table {
    width: 100%; border-collapse: collapse; background: #fff; font-size: 14px;
    min-width: 560px;
}
table.of-table th, table.of-table td {
    padding: 12px 14px; text-align: left; border-bottom: 1px solid var(--of-line);
    vertical-align: top;
}
table.of-table thead th {
    background: #f8fafc; color: var(--of-ink); font-weight: 700; font-size: 13px;
    white-space: nowrap; border-bottom: 1px solid var(--of-line);
}
table.of-table tbody tr:hover { background: #fbfcfe; }
table.of-table tbody tr:last-child td { border-bottom: 0; }
table.of-table td.is-center, table.of-table th.is-center { text-align: center; }
.of-table-note { color: var(--of-muted); font-size: 12.5px; margin: 8px 0 0; }

/* ---------- 12. 表单 ---------- */
.of-form-row { margin-bottom: 16px; }
.of-label { display: block; font-weight: 600; color: var(--of-ink); font-size: 13.5px; margin-bottom: 6px; }
.of-label .of-req { color: var(--of-red); margin-left: 2px; }
.of-input, .of-select, .of-textarea {
    width: 100%; padding: 11px 13px; font-size: 14.5px; font-family: inherit;
    color: var(--of-ink); background: #fff;
    border: 1px solid var(--of-line); border-radius: 10px;
    transition: border-color .15s, box-shadow .15s;
}
.of-input:focus, .of-select:focus, .of-textarea:focus {
    outline: 0; border-color: var(--of-primary); box-shadow: 0 0 0 3px rgba(37, 99, 235, .14);
}
.of-textarea { min-height: 120px; resize: vertical; line-height: 1.65; }
.of-input.is-mono { font-family: Consolas, "Cascadia Mono", monospace; letter-spacing: 1px; text-transform: uppercase; }
.of-hint { color: var(--of-muted); font-size: 12.5px; margin: 6px 0 0; }
.of-check { display: flex; gap: 9px; align-items: flex-start; font-size: 13.5px; color: var(--of-text); }
.of-check input { margin-top: 4px; width: 16px; height: 16px; flex: 0 0 auto; accent-color: var(--of-primary); }
.of-form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 16px; }
.of-btn-row { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin-top: 18px; }
.of-fieldset { border: 0; padding: 0; margin: 0; }

/* ---------- 13. 提示 / 结果卡 ---------- */
.of-alert {
    border-radius: var(--of-radius-sm); padding: 13px 16px; font-size: 14px;
    border: 1px solid var(--of-line); background: #fff; margin-bottom: 16px;
    display: flex; gap: 10px; align-items: flex-start;
}
.of-alert.is-ok { background: var(--of-green-soft); border-color: #bfe8ce; color: #14532d; }
.of-alert.is-err { background: var(--of-red-soft); border-color: #f6cdcd; color: #7f1d1d; }
.of-alert.is-warn { background: var(--of-amber-soft); border-color: #f5e0b7; color: #7c4a03; }
.of-alert.is-info { background: var(--of-primary-soft); border-color: #cddcff; color: #1e3a8a; }
.of-alert b { font-weight: 700; }
.of-alert .of-alert-ico { flex: 0 0 auto; font-weight: 800; }

.of-result {
    border-radius: var(--of-radius); border: 1px solid #bfe8ce; background: #fff;
    overflow: hidden; box-shadow: var(--of-shadow); margin-bottom: 24px;
}
.of-result-head {
    padding: 14px 20px; font-weight: 700; font-size: 15px;
    background: var(--of-green-soft); color: #14532d;
    border-bottom: 1px solid #bfe8ce; display: flex; gap: 10px; align-items: center;
}
.of-result.is-err { border-color: #f6cdcd; }
.of-result.is-err .of-result-head { background: var(--of-red-soft); color: #7f1d1d; border-bottom-color: #f6cdcd; }
.of-result-body { padding: 18px 20px 20px; }
.of-result-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 14px; margin-bottom: 4px; }
.of-rcell { background: #f8fafc; border: 1px solid var(--of-line-soft); border-radius: 10px; padding: 12px 14px; }
.of-rcell i { display: block; font-style: normal; font-size: 12px; color: var(--of-muted); margin-bottom: 3px; }
.of-rcell b { font-size: 15px; color: var(--of-ink); word-break: break-all; font-variant-numeric: tabular-nums; }
.of-rcell b.is-ok { color: var(--of-green); }
.of-rcell b.is-err { color: var(--of-red); }

/* ---------- 14. 步骤 ---------- */
.of-steps { list-style: none; margin: 0; padding: 0; counter-reset: ofstep; }
.of-steps > li {
    position: relative; counter-increment: ofstep;
    padding: 0 0 22px 46px; margin: 0;
}
.of-steps > li::before {
    content: counter(ofstep);
    position: absolute; left: 0; top: 1px;
    width: 30px; height: 30px; border-radius: 50%;
    background: var(--of-primary); color: #fff;
    font-size: 14px; font-weight: 700;
    display: flex; align-items: center; justify-content: center;
}
.of-steps > li::after {
    content: ""; position: absolute; left: 14px; top: 34px; bottom: 6px;
    width: 2px; background: var(--of-line);
}
.of-steps > li:last-child { padding-bottom: 0; }
.of-steps > li:last-child::after { display: none; }
.of-steps h4 { margin: 0 0 4px; font-size: 15px; }
.of-steps p { margin: 0; color: var(--of-muted); font-size: 13.5px; }
.of-steps.is-flow > li { padding-bottom: 18px; }

/* ---------- 15. 价格 ---------- */
.of-plans { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px; align-items: stretch; }
.of-plan {
    position: relative; display: flex; flex-direction: column;
    background: #fff; border: 1px solid var(--of-line); border-radius: var(--of-radius);
    padding: 24px 22px; box-shadow: var(--of-shadow);
}
.of-plan.is-hot { border: 2px solid var(--of-primary); box-shadow: 0 18px 44px -22px rgba(37, 99, 235, .55); }
.of-plan-hot {
    position: absolute; top: -12px; left: 50%; transform: translateX(-50%);
    background: var(--of-primary); color: #fff; font-size: 12px; font-weight: 700;
    padding: 3px 12px; border-radius: 999px; white-space: nowrap;
}
.of-plan h3 { font-size: 17px; margin: 0 0 4px; }
.of-plan-desc { color: var(--of-muted); font-size: 13px; margin: 0 0 14px; min-height: 20px; }
.of-plan-price { display: flex; align-items: baseline; gap: 6px; margin-bottom: 4px; }
.of-plan-price b { font-size: 32px; color: var(--of-ink); letter-spacing: -1px; font-variant-numeric: tabular-nums; }
.of-plan-price span { color: var(--of-muted); font-size: 13px; }
.of-plan-period { color: var(--of-muted); font-size: 12.5px; margin: 0 0 16px; }
.of-plan ul { list-style: none; margin: 0 0 20px; padding: 0; font-size: 13.5px; flex: 1 1 auto; }
.of-plan ul li { position: relative; padding-left: 20px; margin: 7px 0; color: var(--of-text); }
.of-plan ul li::before {
    content: "✓"; position: absolute; left: 0; top: 0;
    color: var(--of-green); font-weight: 700;
}
.of-plan .of-btn { width: 100%; }

/* ---------- 16. FAQ ---------- */
.of-faq { border: 1px solid var(--of-line); border-radius: var(--of-radius); background: #fff; overflow: hidden; }
.of-faq details { border-bottom: 1px solid var(--of-line-soft); }
.of-faq details:last-child { border-bottom: 0; }
.of-faq summary {
    cursor: pointer; padding: 15px 20px; font-weight: 600; color: var(--of-ink);
    font-size: 14.5px; list-style: none; display: flex; gap: 10px; align-items: flex-start;
}
.of-faq summary::-webkit-details-marker { display: none; }
.of-faq summary::before { content: "＋"; color: var(--of-primary); font-weight: 700; flex: 0 0 auto; }
.of-faq details[open] summary::before { content: "－"; }
.of-faq details[open] summary { background: #fbfcfe; }
.of-faq .of-faq-body { padding: 0 20px 16px 46px; color: var(--of-muted); font-size: 13.5px; }
.of-faq .of-faq-body p:last-child { margin-bottom: 0; }

/* ---------- 17. 时间线（更新日志） ---------- */
.of-timeline { list-style: none; margin: 0; padding: 0; }
.of-tl-item {
    position: relative; padding: 0 0 26px 30px;
    border-left: 2px solid var(--of-line); margin-left: 7px;
}
.of-tl-item:last-child { border-left-color: transparent; padding-bottom: 0; }
.of-tl-item::before {
    content: ""; position: absolute; left: -8px; top: 6px;
    width: 14px; height: 14px; border-radius: 50%;
    background: #fff; border: 3px solid var(--of-primary);
}
.of-tl-item.is-announce::before { border-color: var(--of-accent); }
.of-tl-head { display: flex; flex-wrap: wrap; gap: 8px 12px; align-items: center; margin-bottom: 8px; }
.of-tl-head h3 { margin: 0; font-size: 16.5px; }
.of-tl-date { color: var(--of-muted); font-size: 12.5px; }
.of-tl-body { color: var(--of-text); font-size: 14px; }
.of-tl-body p { margin: 0 0 .6em; }
.of-tl-body p:last-child { margin-bottom: 0; }
.of-tl-body pre { margin-top: .6em; }

/* ---------- 18. 分页 ---------- */
.of-pager { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; justify-content: center; margin-top: 28px; }
.of-pager a, .of-pager span {
    min-width: 38px; height: 38px; padding: 0 12px;
    display: inline-flex; align-items: center; justify-content: center;
    border: 1px solid var(--of-line); background: #fff; border-radius: 9px;
    color: var(--of-text); font-size: 14px;
}
.of-pager a:hover { border-color: var(--of-primary); color: var(--of-primary); }
.of-pager span.is-on { background: var(--of-primary); border-color: var(--of-primary); color: #fff; font-weight: 700; }
.of-pager span.is-gap { border: 0; background: none; color: var(--of-muted); }
.of-pager span.is-off { color: #c3ccd9; background: #f8fafc; }

/* ---------- 19. 筛选条 ---------- */
.of-filter {
    background: #fff; border: 1px solid var(--of-line); border-radius: var(--of-radius);
    padding: 16px 18px; box-shadow: var(--of-shadow); margin-bottom: 24px;
}
.of-filter-row { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.of-filter-row .of-input { flex: 1 1 220px; min-width: 0; }
.of-filter-row .of-btn { flex: 0 0 auto; }
.of-cats { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; padding-top: 14px; border-top: 1px solid var(--of-line-soft); }
.of-cat {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 6px 13px; border-radius: 999px; font-size: 13px;
    background: #f4f6fa; color: var(--of-text); border: 1px solid transparent;
}
.of-cat:hover { background: #e9eef6; color: var(--of-ink); }
.of-cat.is-on { background: var(--of-primary); color: #fff; font-weight: 600; }
.of-cat i { font-style: normal; opacity: .7; font-size: 12px; }
.of-empty { text-align: center; padding: 48px 18px; color: var(--of-muted); }
.of-empty b { display: block; color: var(--of-ink); font-size: 16px; margin-bottom: 6px; }

/* ---------- 20. 文档 ---------- */
.of-doclist { list-style: none; margin: 0; padding: 0; }
.of-doclist li {
    display: flex; flex-wrap: wrap; gap: 6px 14px; align-items: center;
    padding: 12px 4px; border-bottom: 1px solid var(--of-line-soft);
}
.of-doclist li:last-child { border-bottom: 0; }
.of-doclist a { font-weight: 600; font-size: 14.5px; }
.of-doclist .of-doc-meta { margin-left: auto; color: var(--of-muted); font-size: 12.5px; white-space: nowrap; }
.of-prose { font-size: 14.5px; color: var(--of-text); word-wrap: break-word; overflow-x: auto; }
.of-prose h1 { font-size: 24px; margin: 26px 0 12px; padding-bottom: 8px; border-bottom: 1px solid var(--of-line); }
.of-prose h2 { font-size: 20px; margin: 24px 0 10px; padding-bottom: 6px; border-bottom: 1px solid var(--of-line-soft); }
.of-prose h3 { font-size: 16.5px; margin: 20px 0 8px; }
.of-prose h4 { font-size: 15px; margin: 16px 0 6px; color: var(--of-ink-2); }
.of-prose > :first-child { margin-top: 0; }
.of-prose ul, .of-prose ol { padding-left: 1.5em; }
.of-prose blockquote {
    margin: 0 0 1em; padding: 10px 16px; border-left: 3px solid var(--of-primary);
    background: var(--of-primary-soft); border-radius: 0 8px 8px 0; color: var(--of-ink-2);
}
.of-prose blockquote p:last-child { margin-bottom: 0; }
.of-prose table { width: 100%; border-collapse: collapse; margin: 0 0 1.2em; font-size: 13.5px; }
.of-prose th, .of-prose td { border: 1px solid var(--of-line); padding: 8px 11px; text-align: left; }
.of-prose th { background: #f8fafc; font-weight: 700; }
.of-prose img { max-width: 100%; }
.of-prose a { border-bottom: 1px solid rgba(37, 99, 235, .35); }

/* ---------- 21. 面包屑 / 页头 ---------- */
.of-crumb { font-size: 13px; color: var(--of-muted); margin-bottom: 10px; }
.of-crumb a { color: var(--of-muted); }
.of-crumb a:hover { color: var(--of-primary); }
.of-crumb span { margin: 0 6px; color: #c3ccd9; }

.of-pagehead {
    background: linear-gradient(160deg, #0d1527 0%, #101c33 100%);
    color: #c3cede; padding: 40px 0 42px;
    border-bottom: 1px solid rgba(255, 255, 255, .07);
}
.of-pagehead h1 { color: #fff; font-size: 30px; margin-bottom: 8px; }
.of-pagehead p { color: #a8b8d0; margin: 0; max-width: 760px; font-size: 15px; }
.of-pagehead .of-crumb { color: #8ea0bd; }
.of-pagehead .of-crumb a { color: #a8b8d0; }
.of-pagehead .of-crumb a:hover { color: #fff; }
.of-pagehead .of-tags { margin-top: 14px; }

/* ---------- 22. 页脚 ---------- */
.of-announce {
    background: #fffbeb; border-top: 1px solid #f5e0b7; border-bottom: 1px solid #f5e0b7;
    color: #7c4a03; font-size: 13.5px;
}
.of-announce .of-wrap { display: flex; gap: 10px; align-items: center; padding-top: 10px; padding-bottom: 10px; }
.of-announce b { flex: 0 0 auto; }
.of-foot { background: var(--of-dark); color: #93a4bd; font-size: 13.5px; padding: 46px 0 0; }
.of-foot-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.2fr; gap: 30px; }
.of-foot h4 { color: #fff; font-size: 14px; margin: 0 0 14px; letter-spacing: .5px; }
.of-foot a { color: #93a4bd; }
.of-foot a:hover { color: #fff; }
.of-foot ul { list-style: none; margin: 0; padding: 0; }
.of-foot ul li { margin: 8px 0; }
.of-foot .of-brand-n { color: #fff; }
.of-foot .of-brand-s { color: #7d8ea8; }
.of-foot-desc { color: #7d8ea8; margin: 12px 0 0; font-size: 13px; max-width: 320px; }
.of-foot-bottom {
    margin-top: 38px; border-top: 1px solid rgba(255, 255, 255, .09);
    padding: 16px 0 22px; display: flex; flex-wrap: wrap; gap: 8px 18px;
    align-items: center; justify-content: space-between; color: #7d8ea8; font-size: 13px;
}
.of-foot-bottom .of-tags { gap: 10px; }

.of-totop {
    position: fixed; right: 18px; bottom: 18px; z-index: 70;
    width: 42px; height: 42px; border-radius: 50%;
    background: #fff; color: var(--of-ink); border: 1px solid var(--of-line);
    box-shadow: var(--of-shadow-lg); cursor: pointer; font-size: 17px;
    display: none; align-items: center; justify-content: center;
}
.of-totop.is-on { display: flex; }

/* ---------- 23. 滚动显现（仅在 JS 可用时启用，禁用 JS 时内容照常可见） ---------- */
.of-js .of-reveal { opacity: 0; transform: translateY(14px); transition: opacity .5s ease, transform .5s ease; }
.of-js .of-reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
    .of-js .of-reveal { opacity: 1 !important; transform: none !important; transition: none !important; }
    html { scroll-behavior: auto; }
    .of-fcard:hover, .of-pcard:hover { transform: none; }
}

/* ---------- 24. 工具类 ---------- */
.of-muted { color: var(--of-muted); }
.of-small { font-size: 12.5px; }
.of-nowrap { white-space: nowrap; }
.of-mono { font-family: Consolas, "Cascadia Mono", monospace; }
.of-mt0 { margin-top: 0; }
.of-mt8 { margin-top: 8px; }
.of-mt16 { margin-top: 16px; }
.of-mt24 { margin-top: 24px; }
.of-mt32 { margin-top: 32px; }
.of-mb0 { margin-bottom: 0; }
.of-mb16 { margin-bottom: 16px; }
.of-mb24 { margin-bottom: 24px; }
.of-center { text-align: center; }
.of-split { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; justify-content: space-between; }
.of-hr { border: 0; border-top: 1px solid var(--of-line); margin: 28px 0; }
.of-break { word-break: break-all; }
.of-progress { height: 7px; background: #eaeff6; border-radius: 999px; overflow: hidden; }
.of-progress > i { display: block; height: 100%; background: linear-gradient(90deg, var(--of-primary), var(--of-accent)); border-radius: 999px; }

/* ---------- 25. 响应式 ---------- */
@media (max-width: 1080px) {
    .of-plans { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 980px) {
    .of-hero-grid { grid-template-columns: minmax(0, 1fr); gap: 30px; }
    .of-hero { padding: 46px 0 50px; }
    .of-hero h1 { font-size: 32px; }
    .of-g4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .of-stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .of-g3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .of-foot-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
}
@media (max-width: 720px) {
    body { font-size: 14.5px; }
    .of-wrap { padding: 0 14px; }
    h1 { font-size: 24px; }
    h2 { font-size: 20px; }
    .of-sec { padding: 40px 0; }
    .of-sec-head h2 { font-size: 22px; }
    .of-hero h1 { font-size: 27px; }
    .of-hero-sub { font-size: 15px; }
    .of-hero-btns .of-btn { flex: 1 1 100%; }
    .of-pagehead h1 { font-size: 23px; }
    .of-pagehead { padding: 30px 0 32px; }
    .of-g2, .of-g3, .of-g4, .of-auto, .of-auto-sm { grid-template-columns: minmax(0, 1fr); }
    .of-plans { grid-template-columns: minmax(0, 1fr); }
    .of-form-grid { grid-template-columns: minmax(0, 1fr); }
    .of-card { padding: 18px; }
    .of-stat b { font-size: 25px; }
    .of-btn { padding: 11px 16px; }
    .of-plan-price b { font-size: 27px; }
    .of-doclist .of-doc-meta { margin-left: 0; width: 100%; }
    .of-faq .of-faq-body { padding-left: 20px; }
    .of-steps > li { padding-left: 40px; }
    .of-tl-item { padding-left: 22px; }
}
@media (max-width: 400px) {
    .of-brand-s { display: none; }
    .of-hero h1 { font-size: 24px; }
    .of-btn { font-size: 14px; }
    .of-filter-row .of-btn { width: 100%; }
}